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    Priorities of R, S Conventions

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    • How many possible trisubstituted derivatives C6H3X2Y can be btained from the meta disubstituted benzene C6H4X2? (Ignore directive effects of the substituents X and assume that all positions on the ring are accessible to the reagent Y+).
    1. One 2. Two 3. Three 4. four

    • In assigning priorities according to R,S convention, which group ranks highest?
    1. -CH2(CH2)10CH3
    2. -CH(CH3)2
    3. -C(CH3)3
    4. -CH2Cl
    5. -CH2(CH2)10Cl

    • Which of the following compounds reacts with cyclopentanone to yield and amine?
    1. NaNH2
    2. (CH3)2CHNH2
    3. (CH3)3N
    4. (CH3)2NH

    • In a strongly acidic solution the amino acid lysine exists as the dication:
    +
    H3N(CH2)4CHOOH
    +
    NH3
    As the pH is raised what monocation is formed from the loss of the proton from the dication?
    O
    
    1. H2N(CH2)4CHC OH

    + NH3
    2.
    O
    + 
    H3N(CH2)4C OH

    NH2
    3.
    O
    + 
    H3N(CH2)4C OH-

    +NH3
    4.
    O
    + 
    H3N(CH2)4C OH

    +NH3

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    https://brainmass.com/chemistry/organic-reactions/priorities-conventions-433463

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    1.

    2.
    "3" is a one-step reaction. It proceeds via an SN2 reaction.
    3.
    "2" is the strongest. The F group is ...

    Solution Summary

    Priorities of R, S conventions are examined.

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